Molding-machine.



E. RONGERAY.

MOLDING MACHINE. APPLICATION FILED JUNE 20, 1912.

Patented Mar. 24, 1914.

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M -W. fl/ mim E. RONCERAY.

MOLDING MACHINE.

APPLICATION FILED JUNE 20, 1913.

1,091,020. Patented Mar. 24, 1914.

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COLUMBIA PLANOGRAPH CQHWASHINOTON. D- C E. RONGERAY.

MOLDING MACHINE.

APPLICATION FILED JUNE 20, 1913. 1,091,020. Patented Mar. 24, 19M

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WITNE SES. 044, Maya nnrrnn STATES. PATENT orrion.

EUGENE RONCEBAY, OF PARIS, FRANCE,

ASSIGNQR TO SOGIETE ANONYME DES ETAB- LISSEMENTS PH. BONVILLAIN 85 E.RONCERAY, 0F PARIS, FRANCE, A. CORPORA- TION 0E FRANCE.

MOLDING-MACHINE.

LQQLUZO.

Specification of Letters Patent.

Patented Mar. 24, 1914.

Application filed June 20, 1913. Serial No. 774,785.

To all whom it may concern:

Be it known that I, EUGENE RONCERAY, a citizen of France, residing atParis, France, have invented certain new provements in Molding-Machines,the following is a specification. I

This invention has reference to molding machines, and particularly tomachines for simultaneously ramming the halves of a sand mold. It hasfor its primary objects the provision of improved apparatussimultaneously ramming the halves of sand molds; the provision inapparatus of the character described of improved means for removing thesand molds from the flasks and in general the provision of improvedapparatus, simple in construction and effectlve in operation, forramming the halves of the molds and removing the completed sand moldsfrom the flasks. My invention further contemplates the provision of1mproved means for automatically locking the flasks together and theprovision of mproved means for protecting the working parts from sand.Still another ob eot of the invention resides in the provision of anovel means for supplying fluid pressure to the operating pistons and inthe provision of novel means for supporting the flasks in the machines.

The foregoing together with such other objects as may hereinafter appearor 1 are incident to the invention, I accomplish by means of mechanismwhich I have shown in the accompanying drawings in preferred form. Inthe drawings:

Fig. 1 is a sectional elevation of-my improved apparatus; Fig. 2 is asideelevation of Fig. 1 partially in section; Fig. 3 is a plan view ofthe apparatus in inoperative condition; Fig. 4 is a partial section andside elevation of the flask; and Fig. 5 is a plan view of the upperflask.

In carrying out my invention 1 provide a main frame work 1 provided atone side with a vertically disposed collar 2 in which is keyed avertical supporting column 3. Rotatably mounted in the upper portion ofthe column 3 is a cross bar a provided with a fixed platen 5. Arrangedon the main frame work 1 on the side opposite the collar or socket 2, isa standard 8 in which is detachably mounted a vertically extending rod 8on which is pivoted a hooked rod 7 adapted to engage the projection 6formed of which for on the cross bar 4. Intermediate the socket 2 andthe cross bar 4, the column 3 is provided with a fixed abutment 45*. Asleeve 4 is mounted on the column 3 and bears at its lower end againstthe abutment 4: said sleeve serving to position the cross bar t on thecolumn but permitting free rotation thereof about the column. Slidablymounted on the sleeve l between the fixed abutment P and the cross bar tis a socket or collar 11 carrying a forked frame 9 which is providedwith three notched lugs 14:. The lugs 14 are adapted to be engaged bypins 13 mounted on the pattern plate 10, the an rangement of the forkedframe and supports being such as to provide a three-point support forthe pattern plate.

Located beneath the main frame is a cylinder 17 which is rigidly securedto the frame work by means of the stay rods 18. A hollow piston 19 ismounted in the cylinder 17 and is closed at its upper end by a late 21in which are mounted four rods or posts 22. Fastened to the upper end ofthe posts 22 is a plate 23 on which a false bottom 31 for the flasks isadapted to rest. Mounted within the hollow piston 19 is a piston 20 intowhich is threaded a vertical rod 27 which passes through the frame work1 and is guided by the bearing block 28 fastened to the frame workl. Theupper part of the rod 27 is provided with an enlargement or shoulder 26provided with an interiorly threaded aperture, with which the threadedstem 25 of the plate 24 has engagement. The plate 24: is provided withexternal threads or corrugations 24*, the purpose of which willhereinafter appear.

A frame Work 29 is carried on the shoulder 26, (see particularly Figs. 1and 2), and this frame work detachably carries the lower or drag flask30 of the mold. The upper flask or cope 32 is normally carried on thepattern plate 10. The flask 32 is provided with projections 33 arrangedon opposite sides.

The cross bar 4: is provided on opposite sides with blocks 38 in whichare mounted axles 37 having at their outer ends the sleeves 36 adaptedto receive the axles 35 of the lever arms 341- By the arrangement ofaxles substantially at right angles to one another rotative movement maybe imparted to the arms 34 about a vertical axis and about asubstantially horizontal axis. The construction is clearly shown in Fig.3 a portion of which is broken away to illustrate the mounting of theaxis. As shown in Fig 1 the arms 34 are bent on themselves to pro- 5vide a crook adapted to embrace the projections 33. T e arms arenormally held in the position indicated in Figs. 1 and 2 by the springs16 which tend to hold the arms inward toward the platen 5.

The piston 19 is preferably operated hydraulically, liquid underpressure being admitted into the lower portion of the piston 17 throughthe connection 15. A volume of air is imprisoned in the hollow piston 19by the piston 20, and liquid under pressure is admitted to the chamberin the piston 19 above the piston 20 by' means of the port 48 and thepipe 49 which is supported from the cylinder 17 and mounted in suchmanner 20 that the piston 19 can freely rise in the cylinder 17. This isaccomplished by providing a sleeve 50 mounted on the head of the piston19 and into which the pipe 49 telescopes. Leakage is prevented by thestufling box 51.

The flask 32 is provided with a pair of diagonally disposed downwardlyprojecting pins mounted in lugs 42, the upper faces of which areinclined to shed off any sand 8Q, that may fall down. These pins engageapertured lugs 41 formed on the lower flask 30. The lower flask isprovided with a pair of hooks 43 adapted to be engaged by the hookedarms 44 pivotally mounted on the 35 ;lugs 46 formed on the upper flask.A plate 47 preferably composed of rubber or leather is secured, to theflask 32 above each of the arms 44. These plates are adapted to preventsand from working in to. the hooks on 4Q the arms 44 and the points ofpivotal support therefor. In order to prevent sand from working into thebearing block 28, a

collapsible sheathing. extends between the shoulder 26 on the rod 27 andthe block 28.

45, The operation. of the apparatus is as follows: The swinging arm 7 isswung clear of the catch 6 and the cross bar 4 is rotated about thecolumn 3 clear of the machine.

The forked frame 9 carryin the pattern the piston 19 because of airimprisoned in the lower part of the chamber of the piston 19, and as thepiston 20 rises, the rod 27, frame work 29, and flask 30 are alsoelevated. It will thus be seen that the plate 23 and falso bottom 31 andthe flask 30 rise together.

As the upward movement of the parts con tinues, the flask 30 comes intoengagement with the bottom of the pattern plate 10, and the latter iselevated lifting with it the flask 32 until the sand in the latter comesinto engagement with the fixed platen 5. The sand in both flasks isrammed simultaneously by the compressive action of the rising pis- 30ton 19. The arms 34 are now moved outwardly and downwardly so as toengage the projections 33 on the under sides thereof, the springs 16serving to hold the arms in secure engagement with the projections.

The pressure is then exhausted from beneath the piston 19, and thepiston 19 and the piston 20 descend by reason of the weight which theycarry. The downward movement of the parts brings the pattern plate 10into engagement with the frame 9, and the movement of the pattern plateis arrested, while the downward movement of the flask 30 and falsebottom 31 continues until the parts are in substantially the positionshown in Fig. 1. The frame 9 carrying the pattern plate 10 is swung outof the way. The downward movement of the parts just described efl'ectsthe drawing of the pattern and pattern plate from both the upper and thelower flasks.

Pressure is again admitted to the under side of the piston 19 causingthe flask 30 and bottom 31 to rise again until the flask 30 comes intoengagement with the flask 32, now supported by the arms 34. As theflasks come together the hooked arms 44 automatically engage the hooks43 on the flask 30, and the two flasks are locked together. The arms 34are then actuated to no release the projections 33, and the pressure isagain exhausted from the under side of the piston 19 while at the sametime liquid under pressure is admitted through the pipe 49 to the upperside of the piston 20. The piston 19 descends by reason of the weight itcarries, as does the piston 20, the latter being also driven down by thepressure on the upper side thereof, such pressure serving to compressthe volume of air confined in the hollow piston 19. It will be seen fromthe foregoing, that during this movement the piston 20 and rod 27descend more rapidly than the piston 19 and the false bottom 31. Thepiston 20 and rod 27 carry the flask 5Q;plate 10 and the flask 32 isalso swung to one side, the position of the cross bar and of V the frame9 being illustrated in Fig. 3. The flask 30 is in the position shown inFigs. 1, 2, and 3. Both flasks are now filled with 55 :sand, the forkedframe 9 is swung about the column 3 until the pattern plate is inalinement with the flask 30, and the cross bar 4 is swung about untilthe platen 5 is in verti cal alinement with the flasks. The arm 7 is .0then hooked over the catch 6 and pressure is admitted into the lowerpart of the cyl- 30 and flask 32 downwardly more rapidly inder17,causing the piston 19 to rise. As than the false bottom 31 descends, andas a the'piston rises, it will be clear that the rods result the sand inboth flasks is partially 22 elevate the plate 23 and the false bottomforced out of the flasks. 6531-of the flask 30. The piston 20 rises withThe downward movement of the rod 27 continues until the shoulder 26engages the block 28, after which the pressure above the piston 20 actson the plate 21 and causes the piston 19 to ascend, this movement takingplace because the downward movement of the rod 27 and piston 20 islimited by the block 28. The elevation of the piston 19 forces the sandmolds and the false bottom 31 completely out of both flasks, and thefalse bottom is then picked up together with the sand molds and carriedto the foundry. Pressure is exhausted from the upper side of the piston20, the parts assume their normal position, and the apparatus is readyfor another operation. It will, of course, be understood that theapparatus is suitably vibrated by any preferred vibratory mechanism 52when the pattern plate is being drawn from the flasks.

Referring to the plate at and the threaded stem 25, it will be seen thatthe said plate takes against the under side of the plate 23, and that byvarying the elevation of the plate 24 with respect to the rod 27,

25 the relative position of the piston 20 in the piston 19 can bechanged. This eflects a similar change in elevation of the flask withrespect to the plate 23 and false bottom 31. The flask 30 and falsebottom 31 30 can therefore be adjusted in relative elevation toaccommodate any desired quantity of sand. The adjustment of the plate24: is facilitated by reason of the external teeth 2 9 on said plate.

35 The apparatus is simple and eflective in operation. A large saving oftime and labor is effected, not only with respect to the ramming of theflasks but also with respect to the subsequent operations in which themolds are removed from the flasks. Another advantage of the apparatusresides in the fact that the same flasks can be used in making a largenumber of molds, thereby reducing the quantity of the equipmentnecessary in carrying out normal molding operations. It will also beclear that the apparatus can be readily accommodated for making molds ofdifferent sizes by changing the parts.

The machine rams the flasks and thereafter ejects them, and it will beseen that the sand molds are ejected one after the other out through thetop flask which is advantageous since the sand of bothparts of the moldis supported during the ejecting operation. The same apparatus thateffects the ramming of the molds also effects the ejection of thecompleted molds.

What I claim is: 1. In molding apparatus the combination 0 of a rammingmember, a cylinder, a hollow piston therein, a second piston in thehollow piston, a flask carried on one of the pistons, a false bottomcarried by the other, means for admitting fluid pressure to advance the5 pistons substantially simultaneously to the ramming member to ram thesand, and means for admitting fluid pressure into the hollow pistonabove the second piston whereby said pistons move relatively to eachother. a

2. In molding apparatus the combination of a ramming member, a cylinder,a hollow piston therein, a second piston in the hollow piston, a flaskcarried on one of the pistons, a false bottom carried by the other,means for admitting fluid pressure in the lower portion of the cylinderto raise both pistons to the ramming member to ram the sand in theflask, means for admitting fluid pressure into thehollow piston abovethe second piston, whereby the two pistons move relatively with respectto one another.

3. In molding apparatus the combination of a ramming member, a cylinder,a hollow piston mounted in the cylinder, a second piston mounted in thehollow piston, there beg ing a cushion of air beneath the bottom of thesecond piston, a flask mounted on one of the pistons, a false bottom onthe other, means for admitting fluid pressure into the cylinder to raisethe pistons toward the ramming member, and means for admitting fluidpressure into the hollow piston above the second piston.

a. In molding apparatus the combination of a frame, a ramming member, acylinder on the frame, a hollow piston in the cylinder, a second pistonin the first piston, a flask carried by one of said pistons, a falsebottom carried by the other piston, means for admitting fluid pressureinto the cylinder to elevate the pistons toward the ramming member,means for admitting fluid pressure into the hollow piston above thesecond piston, and means for limiting the downward movement of thesecond piston.

5. In molding apparatus the combination of a ramming block, a hollowmovable member, a piston member in said hollow member, a flask carriedby one of said members, a false bottom carried by the other, means for 1elevating the movable member toward the ramming block, and means foradmitting fluid pressure into the hollow member above the piston memberwhereby said members 6. In molding apparatus the combination of a frame,a ramming block thereon, a flask, means for elevating the flask towardthe block, engaging means on the flask, and means adjacent the blockadapted to receive the engaging means on the flask comprising membersmounted for double rocking movement away from and transverse of theframe.

7. In molding apparatus the combination of a frame, a ramming blockthereon, a flask, means for elevating the flask toward the block,engaging means on the flask, means adjacent the block adapted to receivethe engaging means on the flask comprising 120 are moved relative toeach other. 115

members for double rocking movement away from and transverse of theframe, spring means for holding said means in engagement with J theflask.

In molding apparatus the combination of a ramming member, a flask, afalse bottom therefor, a means for supporting the flask, a means forsupporting the false bottom, both of said means being adapted to advancethe flask and bottom to the ramming Y tion of a ramming member, a flask,a false ,25

bottom therefor, a hollow piston carrying Copies of this patent may beobtained for five cents each,

supporting the the false bottom, a second piston mounted in the first,means for elevating the pistons to advance the flask and bottom, andmeans for admitting fluid pressure into the hollow piston above thesecond piston whereby said pistons are moved relativel to each other.

11. In molding apparatus the combination of a frame, a ramming member, acylinder carried by said frame, a hollow piston mounted in the cylinder,a plate on said piston, a second piston mounted in the first piston, aflask carried by the second piston, a variable abutment on the secondpiston adapted to bear against the plate and EUGENE RON CERAY.lVitnesses I-IANsON C. Coxn, EDMOND JACQUOT.

by addressing the Commissioner of Patents,

Washington, D. C.

